You should post your question on the Appliances forum.
I have both. 48" Dual Fuel range and 48" Pro.
Bought them 2 years ago when building. Love them both. Don't know about drop-ins or warming drawers, but it would seem that there would not be enough room to install a warming drawer beneath the cooktop and oven. Also, buying components separately, they usually end up costing more unless you mix brands. And finally, unless it is specifically made for it, mounting a microwave below the counter may void the warranty due to potential steam burns.
Hard to find "sale" on wolf and sub-z. You might check for discontinued models or floor models. Nothing wrong with them, you usually get the warranty, stores change their displays.